With David Lettermanofficially announcing his retirement from the late-night stage, the question on everyone's mind is "Who will replace him?" Many names have been bandied about, and NBC Universal CEO Steve Burke isn't taking former The Tonight Show host Jay Leno and former 30 Rock star Tina Fey out of the pool of potential candidates despite their past connection to NBC.

According to The Wrap, Burke told a roundtable of reporters both Fey and Leno are contractually free to go as they please, but that Fey is "very happy" working in film and that NBC is still in talks with Leno for specials.

Burke also used the opportunity to tout current The Tonight Show host Jimmy Fallon as the current king of late night, saying Fallon would be successful "no matter who is in the same time period."

Another popular name from the list of possible Letterman replacements is How I Met Your Mother star Neil Patrick Harris. Speaking with The New York Observerabout the chance to take over Letterman's chair, Harris said he was a big fan of CBS and of CBS boss Les Moonves, "so who knows?" However, the eternally busy Harris also admitted it would be "an asinine amount of work."